JP5576448B2 - adapter - Google Patents

Description

  The present invention includes a plug body disposed in a gas flow path and an operation body capable of operating the plug body, and operates the operation body to supply gas from the gas flow path to the outside through the plug. The present invention relates to an adapter used by being mounted on a gas stopper that can be switched between an open state and a closed state in which gas supply is stopped.

  The adapter according to the present application has recently been completed by the inventors as a result of diligent research. For example, the gas plug is attached to a conventional gas plug and the operating body is operated to the open side. The gas can be prevented from being released from the gas.

FIG. 6 shows the appearance of three types of gas stoppers that are in practical use today.
FIG. 6A shows what is called a “fuse gas plug”, which is used by connecting a gas hose to a plug 15 for a hose. 6B is also called a “fuse gas plug”, but the plug 15 corresponds to a so-called gas socket (indicated by a drawing number 40 in FIG. 3). In this example, by simply connecting the gas socket to the plug 15, the connection and fixing between the gas plug 10 and the gas socket can be completed. 6 (a) and 6 (b), the open / close state of the plug body is determined according to the operation state of the operation body, and if the operation body 13 is accidentally operated to the open side, gas leakage or the like occurs. Is a possible structure.

  On the other hand, what is shown in FIG. 6C is called a “gas outlet” and can be connected using the above-described gas socket. This gas outlet employs a structure in which the gas stopper 10 is automatically closed when the gas socket is unexpectedly removed.

  The adapter according to the present application is applicable to a fuse gas plug or the like that does not have an automatic closing structure, as shown in FIGS. An example of a gas stopper provided with this type of stopper is disclosed in Patent Document 1.

  When this type of gas plug is not supplied with gas, the plug is closed, and when supplying gas to gas equipment, the operating body is operated with the gas hose or gas socket connected to the plug. The gas is supplied to the gas device or the like in such a form that the plug is opened and the gas is circulated through the gas flow path.

JP-A-11-166647

  In the conventional gas stopper as described above, even if the gas hose or the gas socket is not connected to the plug, the user can operate the operating tool to open the plug so that the gas can be There was a risk of leakage.

  Further, in the gas stopper, even if it seems that a gas hose or a gas socket is connected to the plug, the connection and fixing may not be sufficient. In this case, the user may determine that the gas hose and the gas socket are normally connected, operate the operating body to open the plug, and may cause gas leakage.

The invention of the present application has been made in view of the above-described problems, and an object of the present invention is to provide a gas plug having a plug body that opens and closes an internal gas flow path and an operation body that can operate the plug body from the outside. An object of the present invention is to provide an adapter that can prevent gas from being unexpectedly released due to erroneous operation of the operating body.

An adapter according to the present invention for achieving the above object is as follows:
A plug body disposed in the gas flow path, and an operating body capable of operating the plug body,
An adapter that is attached to a gas plug that can be switched between an open state in which the operating body is operated and gas is supplied from the gas flow path to the outside via a plug and a closed state in which gas supply is stopped ,
It characterized its configuration includes a cylindrical body that can be interpolated to plug the flow path of the plug,
In a state where the cylindrical main body is inserted in the flow path in the plug, it is biased toward the distal end side of the plug to close the flow path in the main body in the cylindrical main body, and is attached to the proximal end side of the plug. A gas leakage preventing means including a valve body that is biased to open the flow passage in the main body, and a biasing member that biases the valve body toward the distal end side,
With the cylindrical main body inserted in the plug flow path, the gas leakage preventing means is positioned in the plug flow path,
A sealing member that seals the flow path in the main body from a space formed between an outer peripheral surface of the cylindrical main body and an inner peripheral surface of the plug; and a fixing unit that fixes the cylindrical main body to the plug It equipped with a door,
On the outer diameter side of the cylindrical main body, with the cylindrical main body inserted into the flow path in the plug, from one end side of the cylindrical main body located on the tip end side of the plug toward the other end side A gas socket connecting member extended;
With respect to the gas socket connected to the gas stopper and allowing gas to flow between the gas stopper,
The lock ball provided in the gas socket is inserted into a fitting groove provided in the gas socket connection member, and the connection between the gas plug and the gas socket is completed.
A positioning tool for engaging the outer diameter side step portion of the plug from the proximal end side of the plug and positioning the gas socket connecting member and the cylindrical body,
The positioning tool functions as the fixing means .

This adapter is used by being inserted into the plug of the gas stopper described so far.
That is, according to the above-described characteristic configuration, the cylindrical main body is inserted into the flow path in the plug of the plug provided in the gas stopper, and the flow path in the main body in the cylindrical main body is used for gas flow. To do. Further, in the state where the gas leakage preventing means A and the cylindrical main body 22 are inserted into the plug internal flow path 14, the main body flow path formed inside the cylindrical main body includes an urging member and a valve body. Gas leakage prevention means is provided, and the gas leakage prevention means is located in the flow path in the plug, and in a normal state, the valve body is urged by the urging member and is located on the distal end side of the plug. Close the flow path in the main body. That is, by providing the gas leakage preventing means in a plug that has not been provided conventionally, a plug closing function can be obtained in a normal state on the downstream side (gas release side) from the plug body. Therefore, even when the operating body is operated unexpectedly, the gas is not leaked (released).
On the other hand, when the valve body is moved to the base end side of the plug, the flow passage in the main body can be opened, and the gas supply can be allowed.

And in this relationship between the flow path in the main body and the space formed between the inner peripheral surface of the plug and the outer peripheral surface of the cylindrical main body, the seal can be completed by the seal member. Further, by providing the fixing means, the cylindrical main body can be fixed securely in the plug.
From the above, it is possible to prevent gas from leaking from the plug even when the operating body is erroneously operated or when the connection between the plug and the gas socket is insufficient.
Furthermore, according to the above characteristic configuration, the gas socket connecting member extends from one end side of the cylindrical main body located on the tip end side of the plug toward the other end side, and the fitting groove into which the locking ball is fitted. Since the gas hose can be directly connected, the gas socket can be satisfactorily connected to the plug having no fitting groove through the adapter of the present application. .
Furthermore, according to the above-described characteristic configuration, the locking tool is fitted by engaging the positioning tool from the proximal end side of the plug with respect to the outer diameter side step portion that is normally included in the plug to which the gas hose or the like is connected. The gas socket connecting member and the cylindrical main body can be positioned and fixed satisfactorily with respect to the plug having no fitting groove.

  According to a further characteristic configuration of the adapter according to the present invention, the gas leakage prevention means includes an annular valve seat provided in the cylindrical main body and an axial center direction of the flow passage in the main body and is movable in the valve seat. The valve body that is seated to close the flow passage in the main body and the biasing member that biases and seats the valve body toward the valve seat.

  According to the above characteristic configuration, the gas leakage prevention means urges the valve body toward the valve seat by the urging member in a situation where it is desired to prevent gas leakage, and seals between the valve body and the valve seat, The main body flow path can be closed. In addition, when gas is circulated through the flow path in the main body, the valve body is positioned on the side away from the valve seat, the space between the valve body and the valve seat is opened, and the flow path in the main body is opened. it can.

A further characteristic configuration of the adapter according to the present invention relates to a gas socket connected to the plug and enabling gas to flow between the gas plug,
A locking ball provided in the gas socket is fitted into a fitting groove provided in the gas socket connecting member , and the gas plug and the gas socket are connected.

According to the above characteristic configuration, the gas stopper and the gas socket can be fixedly connected well by fitting the locking ball of the gas socket into the fitting groove provided in the gas socket connecting member .

  A further characteristic configuration of the adapter according to the present invention is that the sealing member includes an outer peripheral surface of the plug and an inner peripheral surface of the gas socket connecting member in a state in which the cylindrical main body is inserted into the flow path in the plug. It is a point to seal between.

  According to the above characteristic configuration, the seal member can further seal between the outer peripheral surface of the plug and the inner peripheral surface of the gas socket connecting member, so that the plug and the adapter of the present application can be well sealed.

  According to a further characteristic configuration of the adapter according to the present invention, as the gas socket is connected to the plug, the valve body is provided in the gas socket, and the pressure member is inserted into the flow passage in the main body. It is in the point biased to the base end side of the plug.

  According to the above characteristic configuration, when the gas socket is connected to the plug, the valve body constituting the gas leakage preventing means is configured to be urged toward the proximal end side of the plug by the pressing member of the gas socket. Therefore, only when the gas socket is connected, the flow path in the main body can be opened and the gas can be circulated.

Sectional view of the adapter according to the reference form of the present application Explanatory drawing of the mounting operation of the adapter according to the reference form of the present application State diagram before and after the gas socket is connected to the gas stopper equipped with the adapter according to the reference form of the present application Perspective view of gap and ring-shaped member of adapter according to reference embodiment of the present application Sectional drawing of the adapter which concerns on embodiment of this application Conventional gas stopper

[ Reference form]
But it is not included in the scope of the present gun, but for reference embodiment of the adapter 100 will be described with reference to the drawings. Prior to the description, first, the structure of the gas plug 10 to which the adapter 100 of the present invention is attached will be described with reference to FIG. The gas plug 10 includes a gas passage 11 through which the gas G flows, a plug body 12 that can be switched between an open state that allows the gas G to flow and a closed state that prevents the gas G from flowing, The operating body 13 is connected to switch the state from the outside of the gas flow path 11, and the plug 15 is provided with an in-plug flow path 14 communicating with the gas flow path 11.

  The outer shape of the plug body 12 is configured to be rotatable so as to be in close contact with the inner peripheral surface of the gas flow path 11, and a communication hole 17 through which the gas G can flow is provided in the main body. The plug 12 is connected to the operating body 13 and is configured to rotate by operating the operating body 13. The plug 12 is rotated so that the communication hole 17 coincides with the gas flow direction of the gas flow path 11, thereby opening the gas flow path 11, so that the communication hole 17 is in the gas flow direction of the gas flow path 11. The gas flow path 11 is closed by being rotated so as to be in the vertical direction.

  The plug 15 includes a fitting portion 16 into which a locking ball 43 provided in a gas socket 40 described later is fitted along the circumferential direction of the outer periphery thereof. The plug 15 is inserted into the gas socket 40 and the locking ball 43 is fitted into the fitting portion 16 so that the plug 15 is connected and fixed to the gas socket 40.

Next, the adapter 100 which concerns on the reference form of this application is demonstrated based on FIG. 1, FIG.
In these drawings, FIGS. 1 and 2 (a) show a state before the adapter 100 according to the reference embodiment of the present application is fixed, and FIGS. 2 (b) and 2 (c) show the fixing operation (b). The closed state (c) is shown.
Hereinafter, in the cylindrical main body 22, in a state where the cylindrical main body 22 is inserted into the plug 15, the side close to the base end of the plug 15 is defined as a base end side (left side in FIGS. 1 and 2), and the other end side, The side to which the gas socket 40 is connected is defined as the tip side (the right side in FIGS. 1 and 2). The cylindrical main body 22 is urged toward the distal end side of the plug 15 by a spring 28 that is an urging member, and closes the flow passage 21 in the main body formed inside the cylindrical main body 22, and the proximal end side of the plug 15. In the state where the gas leakage preventing means A including the valve body 27 that is biased to open the flow passage 21 in the main body and the tubular main body 22 are inserted into the flow passage 14 in the plug, 21 is sealed from a space formed between the outer peripheral surface of the cylindrical main body 22 and the inner peripheral surface of the plug 15, and a ring-shaped member 24 that fixes the cylindrical main body 22 to the plug 15 ( It is an example of a fixing means, specifically, a so-called C ring).

The seal member 23 is a so-called seal ring such as a rubber O-ring, and is disposed in the solid member fitting groove 32 on the proximal end side of the cylindrical main body 22.
In the state before fixation shown in FIG. 1 and FIG. 2 (a), the ring-shaped member 24 described above has a biasing force on the outer side in the radial direction at the distal end side of the fixing member insertion groove 32. The main body 22 has a C-ring shape along the inner peripheral surface of the in-body flow path 21. The ring-shaped member 24 is pressed in the axial direction of the cylindrical main body 22 by a ring-shaped member pressing portion 34 provided at a base end side end portion of a valve body 27 of the gas leakage preventing means A described later. It is configured to be slidable in the direction.
As shown in FIGS. 2B and 2C, in a fixed state, the seal member 23 is pressed from the inside in the radial direction to the outside in the radial direction by the ring-shaped member 24, so that the fixing member is fitted. In the vicinity of the insertion groove 32, the space between the inner peripheral surface of the plug 15 and the outer peripheral surface of the cylindrical main body 22 functions so as to be sealed from the channel 21 in the main body.
The ring-shaped member 24 is fixed to the inner peripheral surface of the plug 15 by being fitted in the fixing member insertion groove 32 and being expanded in the radial direction, and the fixing member fitting of the cylindrical main body 22 is performed. The cylindrical main body 22 is fixed in position by coming into contact with the inner surface of the insertion groove 32 in the axial direction. Thereby, the ring-shaped member 24 functions to fix the plug 15 and the cylindrical main body 22 in the axial direction.

In the cylindrical main body 22, an annular valve seat 26 provided along the circumferential direction of the inner periphery of the cylindrical main body 22, and the valve seat 26 on the tip side from the position where the ring-shaped member 24 is provided. Are provided with a valve body 27 seated from the base end side and a spring 28 for urging the valve body 27 from the base end side to the front end side of the valve seat 26, and these function as the gas leakage preventing means A. A seal member 35 is disposed at a portion of the valve body 27 that contacts the valve seat 26, and the gas G flows through the in-body flow path 21 with the valve body 27 seated on the valve seat 26. It is in a closed state that prevents
A ring-shaped member pressing portion 34 that presses and moves the ring-shaped member 24 toward the proximal end as the valve body 27 moves toward the proximal end is provided at the proximal end of the valve body 27. The ring-shaped member pressing portion 34 functions to press and move the ring-shaped member 24 toward the proximal end and to be fitted into the fixing member fitting groove 32.

  A positioning member 25 for positioning the adapter 100 with respect to the plug 15 is provided at the tip of the cylindrical main body 22. The positioning member 25 has a male screw portion 30 that engages with a female screw portion 29 provided on the inner periphery of the end portion on the front end side of the cylindrical main body 22 at one end, and the front end side end of the plug 15 at the other end. It has a flange 31 that contacts the portion 18. The outer diameter of the flange 31 is configured to be larger than the inner diameter of the cylindrical main body 22.

  Next, a mounting process for mounting the adapter 100 described above to the plug flow path 14 of the plug 15 will be described with reference to FIGS.

  As shown in FIG. 2A, the cylindrical main body 22 is inserted into the plug inner flow path 14 of the plug 15 in a form in which the outer peripheral surface of the cylindrical main body 22 is aligned with the inner peripheral surface of the plug 15. With the insertion, the cylindrical main body 22 has a contact surface 31 a of the flange 31 of the positioning member 25 provided at the end of the cylindrical main body 22 against the front end 18 of the plug 15. Interpolated until touching.

  Next, as shown in FIG. 2B, the rod-shaped member B <b> 1 enters the main body flow path 21 of the cylindrical main body 22, and the valve body 27 is urged toward the proximal end side. Thereby, the ring-shaped member pressing part 34 provided in the base end side end part of the valve body 27 presses and moves the ring-shaped member 24 to the base end side. The ring-shaped member 24 is slid along the inner peripheral surface of the in-body channel 21 of the cylindrical body 22. The ring-shaped member 24 is fitted into a fixing member fitting groove 32 provided on the proximal end side of the cylindrical main body 22. The ring-shaped member 24 fitted in the fixing member insertion groove 32 exerts a biasing force on the outer side in the radial direction, and presses the seal member 23 disposed in the fixing member insertion groove 32 to the inner peripheral surface of the plug 15. To do. As a result, the seal member 23 seals between the inner periphery of the plug 15 and the outer periphery of the cylindrical main body 22 at a portion where the axial fixing member insertion groove 32 is provided, and the gas G leaks from this position. Can be prevented.

Further, the ring-shaped member 24 is fixed to the plug 15 because it has a biasing force on the outer side in the radial direction in a form of expanding the diameter. Since the ring-shaped member 24 is fitted in the fixing member fitting groove 32 of the cylindrical main body 22, the ring-shaped member 24 and the cylindrical main body 22 abut in the axial direction, and the cylindrical main body 22 is It will be fixed to the plug 15 in the axial direction.
2B, when the rod-shaped member B1 urges the valve body 27 toward the proximal end side, the positioning member 25 described above has the tubular body 22 with the plug-in channel 14 in the plug 15. A function of fixing the cylindrical main body 22 is exhibited so as not to enter too much into the base end side.
As the rod-shaped member B1 that slides the ring-shaped member 24, the pressure provided in the gas socket body 47 of the gas socket 40 by appropriately setting the shape of the positioning member 25 and the shape of the gas socket 40 described later. It is possible to employ the member 44 (see FIG. 3). If this utilization form is employ | adopted, the ring-shaped member 24 can be slid and fixed by the first connection operation of the gas socket 40 after adapter 100 mounting | wearing.

  Next, as shown in FIG. 2C, the positioning member 25 provided at the end portion on the distal end side of the cylindrical main body 22 is rotated to the release side, and the end portion on the distal end side of the cylindrical main body 22 is then moved. The positioning member 25 can be removed from the cylindrical main body 22 by releasing the screwed state between the female screw portion 29 provided on the inner periphery of the screw and the male screw portion 30 provided on the positioning member 25. Thereby, the adapter 100 can have a more compact structure in the radial direction and the axial direction.

  In addition, the ring-shaped member 24 mentioned above has the notch part 73 by which the part was cut, as shown to the perspective view of Fig.4 (a). As shown in FIGS. 4 (a) and 4 (b), the fixing member fitting groove 32 of the cylindrical main body 22 is formed between the proximal end side cylindrical portion 52 on one end side and the distal end side cylindrical portion 53 on the other end side. The connecting portion 51 is provided so as to connect and fix the proximal end side cylindrical portion 52 and the distal end side cylindrical portion 53. Thereby, the base end side cylinder part 52 and the front end side cylinder part 53 are integrated, and the shape over both parts is hold | maintained. Since the notched portion 73 of the ring-shaped member 24 has a shape along the connecting portion 51, it can slide stably in the axial direction using the connecting portion 51 as a guide.

Next, the connection of the gas socket 40 for gas valve 10 that adapter 100 is connected according to the reference embodiment of the present patent application will be described with reference to FIG. 3 (a) (b).
As shown in FIG. 3A, the gas socket 40 includes a gas socket main body 47, a protruding member 41 urged forward by a first coil spring 48, and a radially outer side on the inner peripheral surface of the protruding member 41. The locking ball 43 whose outer side in the radial direction is positioned by the first regulating surface 45 that is the surface of the first and the second regulating surface 46 that is the inner surface in the radial direction, and the position of the locking ball 43 in the radial direction presses the inner diameter member 42 to retire in the form as it is pressed in contact with the distal end 18 of the plug 15, the valve body 27 of the adapter 100 according to a reference embodiment of the present Application proximally with regulating from inside A pressing member 44 is provided.
When the gas socket 40 is connected to the plug 15, as shown in FIG. 3B, the tip end 18 of the plug 15 abuts against the inner diameter member 42 to attach the inner diameter member 42 to the second coil spring 49. The locking ball 43, which is retracted so as to resist the force and is positioned radially outward by the tip portion of the inner diameter member 42, moves radially inward and fits into the fitting groove 16 of the plug 15. It will be. At the same time, the urging force to the outer side in the radial direction with respect to the locking ball 43 is released, and the locking ball 43 comes into contact with the second regulating surface 46 located on the inner side in the radial direction from the first regulating surface 45. The protruding member 41 that has been fixed in the retracted state protrudes forward (the base end side of the plug 15) when the biasing force of the first coil spring 48 is released. As a result, the locking ball 43 is regulated by the second regulating surface 46 of the protruding member 41 and is fitted into the fitting groove 16 so that the connection with the gas socket 40 with respect to the plug 15 is maintained. . That is, the connection is fixed.
In releasing the gas socket 40, the protruding member 41 may be pushed in.

  As the gas socket 40 is connected to the plug 15, the pressing member 44 provided inside the gas socket 40 abuts on the distal end side end of the valve body 27 inside the adapter 100 and presses toward the proximal end side. And is configured to be moved. As a result, when the gas socket 40 is not connected to the plug 15, the valve body 27 that is seated on the valve seat 26 and maintains the in-body flow path 21 in the closed state is connected to the plug 15. In this way, the main body channel 21 is separated from the valve seat 26 to function as an open state in which the gas G is circulated.

[Implementation Embodiment
Then, with the adapter 10 0 according to the embodiment of the present patent application will be described with reference to FIGS. 5 (a) to (c). Te such embodiments smell, the structure of the similar to the reference embodiment, and that the same reference numerals, description thereof will be omitted.

In the present embodiment, the shape of the plug 67 is different from that of the reference embodiment described above. The plug 15 in the reference embodiment described above has the fitting groove 16 into which the locking ball 43 of the gas socket 40 can be fitted on the outer periphery thereof, whereas the plug 67 of the present embodiment is fitted on the outer periphery thereof. The shape does not have the insertion groove 16 and is configured to connect the gas hose directly. The end portion 75 on the distal end side of the plug 67 of the present embodiment has a constricted shape portion 75 that gradually decreases in diameter toward the distal end side, and an outer diameter side step on the proximal end side of the constricted shape portion 75. A portion 61 is provided.
The adapter 100 according to the present embodiment enables the gas socket 40 to be connected to the plug 67 as described above instead of the gas hose.

The adapter 100 according to the present embodiment includes a gas socket connecting member that extends from the distal end 62 that is one end of the cylindrical main body 22 to the proximal end that is the other end on the outer diameter side of the cylindrical main body 22. 57 and the gas socket connecting member 57 has a fitting groove 58 into which the locking ball 43 of the gas socket 40 is fitted along the circumferential direction of the outer periphery thereof.
A positioning tool 59 having a biasing force on the inner side in the radial direction is provided on the outer peripheral surface of the plug 67 so that the diameter can be increased and decreased along the ring holding gap 60 provided along the circumferential direction of the gas socket connecting member 57. It arrange | positions so that the inner diameter side edge part may contact | abut. This positioning tool 59 has a shape in which the outer diameter gradually decreases toward the distal end side of the plug 67 as the cylindrical main body 22 and the gas socket connecting member 57 are inserted into the plug 67 described above. The outer peripheral surface of the shape portion 75 is pressed outward in the radial direction to increase the diameter. When the cylindrical main body 22 and the gas socket connecting member 57 are inserted to a predetermined position, the positioning tool 59 is inserted into the outer diameter side step portion 61 provided on the outer periphery of the plug 67 in the form of plug. The cylindrical main body 22 and the gas socket connecting member 57 function to position and fix the plug 67 in the axial direction of the plug 67.

As shown in the reference embodiment, the seal member 23 is provided between the inner peripheral surface of the plug 67 and the outer peripheral surface of the cylindrical main body 22 and is connected to the constricted shape portion 75 of the outer peripheral surface of the plug 67 and the gas socket. It is provided between the inner peripheral surface of the member 57. The seal member 23 suitably prevents the gas G from leaking from between the narrowed portion 75 on the outer peripheral surface of the plug 67 and the inner peripheral surface of the gas socket connecting member 57.

  The adapter of the present invention has a plug body that opens and closes an internal gas flow path, and is an adapter that can prevent gas from leaking in a gas plug having an operation body that can be operated from the outside. Is effectively available.

10: Gas plug 11: Gas flow path 12: Plug body 13: Operation body 14: Flow path in plug 15: Plug 16: Insertion groove 21: Flow path in main body 22: Cylindrical main body 23: Seal member 24: Ring shape Member (an example of fixing means)
25: Positioning member 26: Valve seat 27: Valve body 28: Spring 40: Gas socket 43: Locking ball 44: Pressing member 57: Gas socket connecting member 58: Insertion groove 59: Positioning tool 61: Outer diameter side step G: Gas A: Gas leakage prevention means 100: Adapter

Claims (5)

A plug body disposed in the gas flow path, and an operating body capable of operating the plug body,
An adapter that is attached to a gas plug that can be switched between an open state in which the operating body is operated and gas is supplied from the gas flow path to the outside via a plug and a closed state in which gas supply is stopped,
A cylindrical body that can be inserted into the flow path in the plug of the plug;
In a state where the cylindrical main body is inserted in the flow path in the plug, it is biased toward the distal end side of the plug to close the flow path in the main body in the cylindrical main body, and is attached to the proximal end side of the plug. A gas leakage preventing means including a valve body that is biased to open the flow passage in the main body, and a biasing member that biases the valve body toward the distal end side,
With the cylindrical main body inserted in the plug flow path, the gas leakage preventing means is positioned in the plug flow path,
A sealing member that seals the flow path in the main body from a space formed between an outer peripheral surface of the cylindrical main body and an inner peripheral surface of the plug; and a fixing unit that fixes the cylindrical main body to the plug With
On the outer diameter side of the cylindrical main body, with the cylindrical main body inserted into the flow path in the plug, from one end side of the cylindrical main body located on the tip end side of the plug toward the other end side A gas socket connecting member extended;
With respect to the gas socket connected to the gas stopper and allowing gas to flow between the gas stopper,
The lock ball provided in the gas socket is inserted into a fitting groove provided in the gas socket connection member, and the connection between the gas plug and the gas socket is completed.
A positioning tool for engaging the outer diameter side step portion of the plug from the proximal end side of the plug and positioning the gas socket connecting member and the cylindrical body,
An adapter in which the positioning tool serves as the fixing means .   The gas leakage preventing means includes an annular valve seat provided in the cylindrical main body, and is movable in an axial direction of the flow path in the main body and is seated on the valve seat to close the flow path in the main body. The adapter according to claim 1, comprising a valve body and the biasing member that biases and seats the valve body toward the valve seat. Regarding a gas socket connected to the plug and enabling gas to flow between the gas plug,
The adapter according to claim 1 or 2, wherein a locking ball provided in the gas socket is fitted into a fitting groove provided in the gas socket connecting member, and the gas stopper and the gas socket are connected . With the cylindrical main body inserted into the flow path in the plug,
The adapter according to any one of claims 1 to 3, wherein the seal member seals between an outer peripheral surface of the plug and an inner peripheral surface of the gas socket connecting member . As the gas socket is connected to the plug,
The adapter according to any one of claims 1 to 4, wherein the valve body is urged toward a proximal end side of the plug by a pressing member that is provided in the gas socket and enters the flow path in the main body. .

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